C++ headers are aligned with 2.076, as well as all regressions in
the changelog backported. We can build phobos 2.076 and pass all
unittests. Not all features have been backported from D however.
Notably static foreach in the upcoming release (and I have no
plans to port it).
Moving to self hosted (ddmd) is something that will happen soon.
Iain.

Notably static foreach in the upcoming release (and I have no plans to
port it).

Does this mean that gdc will never have static foreach?

No, it just means that maintained fork of the C++ implementation will
not support static foreach.
The D implementation when its finally branched + working with
bootstrapped builds (non-bootstrapped builds are fine and pass all
tests) will initially use 2.076 proper, and so will come with all
features, including static foreach.
Relevant PR https://github.com/D-Programming-GDC/GDC/pull/550